X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=cpu%2Fmpc8260%2Fstart.S;h=2e93bbbb8643df0de8a336b965eb0a08459e8942;hb=ba91e26a1923dfc703d4b96ae9428067b7447ff2;hp=9ceb70495558e6469d8a28195aa67b21df024af1;hpb=5d232d0e7ea982d859d028ab482d95eb68460b19;p=oweals%2Fu-boot.git

diff --git a/cpu/mpc8260/start.S b/cpu/mpc8260/start.S
index 9ceb704955..2e93bbbb86 100644
--- a/cpu/mpc8260/start.S
+++ b/cpu/mpc8260/start.S
@@ -66,6 +66,7 @@
 	GOT_ENTRY(_end_of_vectors)
 	GOT_ENTRY(transfer_to_handler)
 
+	GOT_ENTRY(__init_end)
 	GOT_ENTRY(_end)
 	GOT_ENTRY(__bss_start)
 #if defined(CONFIG_HYMOD)
@@ -160,6 +161,7 @@ _hrcw_table:
 	.globl	_start
 _start:
 	li	r21, BOOTFLAG_COLD	/* Normal Power-On: Boot from FLASH*/
+	nop
 	b	boot_cold
 
 	. = EXC_OFF_SYS_RESET + 0x10
@@ -170,6 +172,18 @@ _start_warm:
 	b	boot_warm
 
 boot_cold:
+#if defined(CONFIG_MPC8260ADS) && defined(CFG_DEFAULT_IMMR)
+	lis	r3, CFG_DEFAULT_IMMR@h
+	nop
+	lwz	r4, 0(r3)
+	nop
+	rlwinm	r4, r4, 0, 8, 5
+	nop
+	oris	r4, r4, 0x0200
+	nop
+	stw	r4, 0(r3)
+	nop
+#endif /* CONFIG_MPC8260ADS && CFG_DEFAULT_IMMR */
 boot_warm:
 	mfmsr	r5			/* save msr contents		*/
 
@@ -305,75 +319,7 @@ ProgramCheck:
 
 	STD_EXCEPTION(0xa00, Trap_0a, UnknownException)
 	STD_EXCEPTION(0xb00, Trap_0b, UnknownException)
-
-	. = 0xc00
-/*
- * r0 - SYSCALL number
- * r3-... arguments
- */
-SystemCall:
-	addis	r11,r0,0		/* get functions table addr */
-	ori	r11,r11,0		/* Note: this code is patched in trap_init */
-	addis	r12,r0,0		/* get number of functions */
-	ori	r12,r12,0
-
-	cmplw	0, r0, r12
-	bge	1f
-
-	rlwinm	r0,r0,2,0,31		/* fn_addr = fn_tbl[r0] */
-	add	r11,r11,r0
-	lwz	r11,0(r11)
-
-	li	r20,0xd00-4		/* Get stack pointer */
-	lwz	r12,0(r20)
-	subi	r12,r12,12		/* Adjust stack pointer */
-	li	r0,0xc00+_end_back-SystemCall
-	cmplw	0, r0, r12		/* Check stack overflow */
-	bgt	1f
-	stw	r12,0(r20)
-
-	mflr	r0
-	stw	r0,0(r12)
-	mfspr	r0,SRR0
-	stw	r0,4(r12)
-	mfspr	r0,SRR1
-	stw	r0,8(r12)
-
-	li	r12,0xc00+_back-SystemCall
-	mtlr	r12
-	mtspr	SRR0,r11
-
-1:	SYNC
-	rfi
-
-_back:
-
-	mfmsr	r11			/* Disable interrupts */
-	li	r12,0
-	ori	r12,r12,MSR_EE
-	andc	r11,r11,r12
-	SYNC				/* Some chip revs need this... */
-	mtmsr	r11
-	SYNC
-
-	li	r12,0xd00-4		/* restore regs */
-	lwz	r12,0(r12)
-
-	lwz	r11,0(r12)
-	mtlr	r11
-	lwz	r11,4(r12)
-	mtspr	SRR0,r11
-	lwz	r11,8(r12)
-	mtspr	SRR1,r11
-
-	addi	r12,r12,12		/* Adjust stack pointer */
-	li	r20,0xd00-4
-	stw	r12,0(r20)
-
-	SYNC
-	rfi
-_end_back:
-
+	STD_EXCEPTION(0xc00, SystemCall, UnknownException)
 	STD_EXCEPTION(0xd00, SingleStep, UnknownException)
 
 	STD_EXCEPTION(0xe00, Trap_0e, UnknownException)
@@ -863,8 +809,8 @@ relocate_code:
 	mr	r3,  r5				/* Destination Address	*/
 	lis	r4, CFG_MONITOR_BASE@h		/* Source      Address	*/
 	ori	r4, r4, CFG_MONITOR_BASE@l
-	lis	r5, CFG_MONITOR_LEN@h		/* Length in Bytes	*/
-	ori	r5, r5, CFG_MONITOR_LEN@l
+	lwz	r5, GOT(__init_end)
+	sub	r5, r5, r4
 	li	r6, CFG_CACHELINE_SIZE		/* Cache Line Size	*/
 
 	/*
@@ -952,8 +898,8 @@ in_ram:
 	/*
 	 * Relocation Function, r14 point to got2+0x8000
 	 *
-         * Adjust got2 pointers, no need to check for 0, this code
-         * already puts a few entries in the table.
+	 * Adjust got2 pointers, no need to check for 0, this code
+	 * already puts a few entries in the table.
 	 */
 	li	r0,__got2_entries@sectoff@l
 	la	r3,GOT(_GOT2_TABLE_)
@@ -967,7 +913,7 @@ in_ram:
 	bdnz	1b
 
 	/*
-         * Now adjust the fixups and the pointers to the fixups
+	 * Now adjust the fixups and the pointers to the fixups
 	 * in case we need to move ourselves again.
 	 */
 2:	li	r0,__fixup_entries@sectoff@l
@@ -1016,12 +962,6 @@ clear_bss:
 	mr	r4, r10		/* Destination Address		*/
 	bl	board_init_r
 
-	/* Problems accessing "end" in C, so do it here */
-	.globl	get_endaddr
-get_endaddr:
-	lwz	r3,GOT(_end)
-	blr
-
 	/*
 	 * Copy exception vector code to low memory
 	 *
@@ -1033,7 +973,7 @@ trap_init:
 	lwz	r7, GOT(_start)
 	lwz	r8, GOT(_end_of_vectors)
 
-	rlwinm	r9, r7, 0, 18, 31	/* _start & 0x3FFF	*/
+	li	r9, 0x100		/* reset vector always at 0x100 */
 
 	cmplw	0, r7, r8
 	bgelr				/* return if r7>=r8 - just in case */